package com.qhw.servlet;

import cn.hutool.captcha.CaptchaUtil;
import cn.hutool.captcha.GifCaptcha;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import javax.servlet.annotation.WebServlet;
import java.io.IOException;
@WebServlet(urlPatterns = "/qhwCode")
public class CodeServlet extends HttpServlet
{
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session = req.getSession();
        //创建线段干扰的验证码
        GifCaptcha gifCaptcha = CaptchaUtil.createGifCaptcha(200, 50,4);
        //获取验证码的值
        String code = gifCaptcha.getCode();
        //将获取的验证码存储到session中，并将键设置为Q
        session.setAttribute("Q",code);
        //将验证码图片响应输出流给客户端
        gifCaptcha.write(resp.getOutputStream());


    }
}
